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Maintenance: Seawater system
Seawater filter. Cleaning
Screw off cover (1) and remove seal plate (2). Lift out
and clean the insert (3).
WARNING!
Risk for water penetration.
IMPORTANT!
If the boat is used in water that
has a lot of contaminants, seaweed etc. the filter
must be checked more frequently than indicated
in the maintenance schedule. Otherwise there is
a risk the filter will clog and the engine will over-
heat.
Anti-siphon valve. Checking
IMPORTANT! If the anti-siphon valve does not
function, there is a risk that sea water will get
into the engine. Change the anti-siphon valve as
necessary.
The anti-siphon valve (1) in reversing gear installa-
tions must be function checked regularly. The check
must be done both when the engine is stopped and
when it is running.
Undo the hose (2). Blow down the hose. When the
engine is stopped, air should pass easily through the
valve. When the engine is running, the valve is closed
and no air should pass.
Check and clean the nipple (3) on the sea water filter.
Impeller. Checking/Replacing
WARNING!
Risk for water penetration.
Remove the cover from the seawater pump and re-
move the impeller (1). If there are cracks or other de-
fects the impeller must be replaced. (If the pump shaft
can be turned by hand the flange must be replaced).
Lubricate the pump housing and the inside of the cov-
er with a little waterproof grease
for rubber
.
Reinstall the impeller using a rotating movement. In-
stall the seal washers on the shaft
center. Install the cover together with a new gasket.
Reverse gear: Open the sea cock.
Seawater system
The sea water system is the engine’s external cooling system. On engines with stern drives, the sea water pump
sucks in water via the drive, after which the water passes the sea water filter before it is pumped through the inter-
cooler, heat exchanger and the engine oil cooler. Finally, the water is pumped out into the exhaust pipe elbow,
where it is mixed with the exhaust gas.
On engines with a reversing gear, the sea water pump sucks in water via the hull fitting, after which the water pas-
ses the sea water filter (optional equipment) before it is pumped through the intercooler, heat exchanger and the
engine oil cooler. Finally, the water is pumped out into the exhaust pipe elbow, where it is mixed with the exhaust
gas.
WARNING!
There is a risk that water will enter while working on the seawater system (if the boat is in the
water). Water may flow into the boat if a hose, plug or similar object located below the waterline is removed.
So always close the seawater cock. If the boat does not have a seawater cock, the flow of water must be
stopped in a safe manner. The boat must be brought up on land if this is not possible.
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Summary of Contents for KAD/KAMD300
Page 1: ...OPERATOR S MANUAL KAD KAMD44P KAD KAMD300 ...
Page 97: ...95 Notes ...
Page 98: ...96 Notes ...
Page 103: ......
Page 104: ...7742203 English 03 2006 ...
